Pressure Converter
Pressure Converter
Use the converter above to instantly convert between any two units of pressure. This converter supports pascals, kilopascals, bar, atmospheres, PSI, mmHg, and inHg — covering every pressure conversion you are likely to need.
Whether you are checking tire pressure, reading a weather forecast, monitoring blood pressure, or working with hydraulic systems, this free converter gives you an instant accurate result.
How to convert pressure units
The pascal (Pa) is the SI base unit of pressure, defined as one newton per square meter. In everyday use the pascal is very small, so kilopascals (kPa) and bar are more common in engineering and science.
PSI (pounds per square inch) is the standard unit for tire pressure and hydraulic pressure in the United States. Standard atmospheric pressure equals 14.696 PSI = 1.01325 bar = 101,325 Pa = 760 mmHg.
mmHg (millimeters of mercury) is used for blood pressure readings and was the historical standard for barometric pressure. A normal blood pressure reading of 120/80 means 120 mmHg systolic and 80 mmHg diastolic.
Pressure conversion reference table
| Unit | PSI | kPa |
|---|---|---|
| 1 Pascal (Pa) | 0.000145 PSI | 0.001 kPa |
| 1 Kilopascal (kPa) | 0.145 PSI | 1 kPa |
| 1 Bar | 14.504 PSI | 100 kPa |
| 1 Atmosphere (atm) | 14.696 PSI | 101.325 kPa |
| 1 PSI | 1 PSI | 6.895 kPa |
| 1 mmHg (Torr) | 0.01934 PSI | 0.133 kPa |
| 1 inHg | 0.491 PSI | 3.386 kPa |